Channel QR Code scanner [WIP]

flutter/Makefile

@@ -18,6 +18,16 @@ run-android:
 	flutter pub run build_runner build
 	_JAVA_OPTIONS="" flutter run -d 10.10.10.177:5555
 
+install-release:
+	# Install on Pixel 7a
+	flutter build apk --release
+	flutter install --release -d 35221JEHN07157
+
+build-release:
+	flutter build apk       --release
+	flutter build appbundle --release
+	flutter build linux     --release
+
 test:
 	dart analyze
 

flutter/ios/Runner/Info.plist

@@ -45,5 +45,10 @@
 	<true/>
 	<key>UIApplicationSupportsIndirectInputEvents</key>
 	<true/>
+	<key>NSCameraUsageDescription</key>
+	<string>This app needs camera access to scan QR codes</string>
+
+	<key>NSPhotoLibraryUsageDescription</key>
+	<string>This app needs photos access to get QR code from photo library</string>
 </dict>
 </plist>

flutter/lib/models/scan_result.dart

@@ -0,0 +1,75 @@
+import 'package:simplecloudnotifier/models/channel.dart';
+
+enum ScanResultMode { ChannelSubscribe, MessageSend, Channel }
+
+abstract class ScanResult {
+  ScanResultMode get mode;
+
+  static ScanResult? parse(String v) {
+    var lines = v.split('\n');
+
+    if (lines.length == 1 && lines[0].startsWith('https://simplecloudnotifier.de?')) {
+      final v = Uri.tryParse(lines[0]);
+
+      if (v != null && v.queryParameters.containsKey('preset_user_id') && v.queryParameters.containsKey('preset_user_key')) {
+        return ScanResultMessageSend(userID: v.queryParameters['preset_user_id']!, userKey: v.queryParameters['preset_user_key']);
+      }
+      if (v != null && v.queryParameters.containsKey('preset_user_id') && v.queryParameters.containsKey('preset_user_key')) {
+        return ScanResultMessageSend(userID: v.queryParameters['preset_user_id']!, userKey: null);
+      }
+    }
+
+    if (lines.length == 6 && lines[0] == '@scn.channel.subscribe' && lines[1] == 'v1') {
+      return ScanResultChannelSubscribe(channelDisplayName: lines[2], ownerUserID: lines[3], channelID: lines[4], subscribeKey: lines[5]);
+    }
+
+    if (lines.length == 5 && lines[0] == '@scn.channel' && lines[1] == 'v1') {
+      if (lines.length != 4) return null;
+
+      return ScanResultChannel(channelDisplayName: lines[2], ownerUserID: lines[3], channelID: lines[4]);
+    }
+
+    return null;
+  }
+
+  static String createChannelQR(Channel channel) {
+    return '@scn.channel' + '\n' + "v1" + '\n' + channel.displayName + '\n' + channel.ownerUserID + '\n' + channel.channelID;
+  }
+
+  static String createChannelSubscribeQR(Channel channel, String subscribeKey) {
+    return '@scn.channel.subscribe' + '\n' + "v1" + '\n' + channel.displayName + '\n' + channel.ownerUserID + '\n' + channel.channelID + '\n' + subscribeKey;
+  }
+}
+
+class ScanResultMessageSend extends ScanResult {
+  final String userID;
+  final String? userKey;
+
+  ScanResultMessageSend({required this.userID, required this.userKey});
+
+  @override
+  ScanResultMode get mode => ScanResultMode.MessageSend;
+}
+
+class ScanResultChannel extends ScanResult {
+  final String channelDisplayName;
+  final String ownerUserID;
+  final String channelID;
+
+  ScanResultChannel({required this.channelDisplayName, required this.ownerUserID, required this.channelID});
+
+  @override
+  ScanResultMode get mode => ScanResultMode.Channel;
+}
+
+class ScanResultChannelSubscribe extends ScanResult {
+  final String channelDisplayName;
+  final String ownerUserID;
+  final String channelID;
+  final String subscribeKey;
+
+  ScanResultChannelSubscribe({required this.channelDisplayName, required this.ownerUserID, required this.channelID, required this.subscribeKey});
+
+  @override
+  ScanResultMode get mode => ScanResultMode.ChannelSubscribe;
+}

flutter/lib/pages/channel_list/channel_list.dart

@@ -4,6 +4,7 @@ import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
 import 'package:provider/provider.dart';
 import 'package:simplecloudnotifier/api/api_client.dart';
 import 'package:simplecloudnotifier/models/channel.dart';
+import 'package:simplecloudnotifier/pages/channel_list/channel_scanner.dart';
 import 'package:simplecloudnotifier/state/app_bar_state.dart';
 import 'package:simplecloudnotifier/state/application_log.dart';
 import 'package:simplecloudnotifier/state/app_auth.dart';
@@ -168,7 +169,7 @@ class _ChannelRootPageState extends State<ChannelRootPage> with RouteAware {
       floatingActionButton: FloatingActionButton(
         heroTag: 'fab_channel_list_qr',
         onPressed: () {
-          //TODO scan qr code to subscribe channel
+          Navi.push(context, () => ChannelScannerPage());
         },
         child: const Icon(FontAwesomeIcons.qrcode),
       ),

flutter/lib/pages/channel_list/channel_list_item.dart

@@ -199,7 +199,7 @@ class _ChannelListItemState extends State<ChannelListItem> {
         await APIClient.deleteSubscription(acc, widget.channel.channelID, widget.subscription!.subscriptionID);
         widget.onChannelListReloadTrigger.call();
 
-        widget.onSubscriptionChanged?.call(widget.channel.channelID, null);
+        widget.onSubscriptionChanged.call(widget.channel.channelID, null);
 
         Toaster.success("Success", 'Unsubscribed from channel');
       } catch (exc, trace) {

flutter/lib/pages/channel_list/channel_scanner.dart

@@ -0,0 +1,117 @@
+import 'package:flutter/material.dart';
+import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+import 'package:mobile_scanner/mobile_scanner.dart';
+import 'package:simplecloudnotifier/components/layout/scaffold.dart';
+import 'package:simplecloudnotifier/models/scan_result.dart';
+import 'package:simplecloudnotifier/utils/ui.dart';
+
+class ChannelScannerPage extends StatefulWidget {
+  const ChannelScannerPage({super.key});
+
+  @override
+  State<ChannelScannerPage> createState() => _ChannelScannerPageState();
+}
+
+class _ChannelScannerPageState extends State<ChannelScannerPage> {
+  final MobileScannerController _controller = MobileScannerController(
+    formats: const [BarcodeFormat.qrCode],
+  );
+
+  ScanResult? scanResult = null;
+
+  @override
+  void initState() {
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return SCNScaffold(
+      title: "Scanner",
+      showSearch: false,
+      showShare: false,
+      child: SingleChildScrollView(
+        child: Padding(
+          padding: const EdgeInsets.fromLTRB(24, 16, 24, 16),
+          child: Column(
+            children: [
+              SizedBox(height: 16),
+              Center(
+                child: Container(
+                  decoration: BoxDecoration(
+                    borderRadius: BorderRadius.circular(UI.DefaultBorderRadius),
+                  ),
+                  clipBehavior: Clip.hardEdge,
+                  child: SizedBox(
+                    height: 300,
+                    width: 300,
+                    child: MobileScanner(
+                      fit: BoxFit.cover,
+                      controller: _controller,
+                      onDetect: _handleBarcode,
+                    ),
+                  ),
+                ),
+              ),
+              SizedBox(height: 16),
+              _buildScanResult(context),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  void _handleBarcode(BarcodeCapture barcodes) {
+    setState(() {
+      if (barcodes.barcodes.isEmpty) {
+        scanResult = null;
+      } else {
+        print('parsed: ${barcodes.barcodes[0].rawValue}');
+        scanResult = ScanResult.parse(barcodes.barcodes[0].rawValue ?? '');
+      }
+    });
+  }
+
+  Widget _buildScanResult(BuildContext context) {
+    if (scanResult == null) {
+      return UI.box(
+        padding: EdgeInsets.fromLTRB(16, 2, 4, 2), //TODO
+        context: context,
+        child: Center(
+          child: Icon(FontAwesomeIcons.solidEmptySet, size: 64, color: Theme.of(context).colorScheme.onPrimaryContainer.withAlpha(128)),
+        ),
+      );
+    }
+
+    if (scanResult! is ScanResultMessageSend) {
+      return UI.box(
+        padding: EdgeInsets.fromLTRB(16, 2, 4, 2),
+        context: context,
+        child: Text("TODO -- ScanResultMessageSend"), //TODO
+      );
+    }
+
+    if (scanResult! is ScanResultChannel) {
+      return UI.box(
+        padding: EdgeInsets.fromLTRB(16, 2, 4, 2),
+        context: context,
+        child: Text("TODO -- ScanResultChannel"), //TODO
+      );
+    }
+
+    if (scanResult! is ScanResultChannelSubscribe) {
+      return UI.box(
+        padding: EdgeInsets.fromLTRB(16, 2, 4, 2),
+        context: context,
+        child: Text("TODO -- ScanResultChannelSubscribe"), //TODO
+      );
+    }
+
+    return UI.box(
+      padding: EdgeInsets.fromLTRB(16, 2, 4, 2),
+      context: context,
+      child: Text("TODO -- ERROR"), //TODO
+    );
+  }
+}

flutter/lib/pages/channel_view/channel_view.dart

@@ -5,6 +5,7 @@ import 'package:share_plus/share_plus.dart';
 import 'package:simplecloudnotifier/api/api_client.dart';
 import 'package:simplecloudnotifier/components/layout/scaffold.dart';
 import 'package:simplecloudnotifier/models/channel.dart';
+import 'package:simplecloudnotifier/models/scan_result.dart';
 import 'package:simplecloudnotifier/models/subscription.dart';
 import 'package:simplecloudnotifier/models/user.dart';
 import 'package:simplecloudnotifier/pages/channel_message_view/channel_message_view.dart';
@@ -295,8 +296,8 @@ class _ChannelViewPageState extends State<ChannelViewPage> {
     return FutureBuilder(
       future: _futureSubscribeKey.future,
       builder: (context, snapshot) {
-        if (snapshot.hasData && snapshot.data != null) {
+        if (snapshot.hasData) {
-          var text = '@scn.channel.subscribe' + '\n' + "v1" + '\n' + channel!.displayName + '\n' + channel!.ownerUserID + '\n' + channel!.channelID + '\n' + snapshot.data!;
+          final text = (snapshot.data == null) ? ScanResult.createChannelQR(channel!) : ScanResult.createChannelSubscribeQR(channel!, snapshot.data!);
           return GestureDetector(
             onTap: () {
               Share.share(text, subject: _displayNameOverride ?? channel!.displayName);
@@ -317,12 +318,6 @@ class _ChannelViewPageState extends State<ChannelViewPage> {
               ),
             ),
           );
-        } else if (snapshot.hasData && snapshot.data == null) {
-          return const SizedBox(
-            width: 300.0,
-            height: 300.0,
-            child: Center(child: Icon(FontAwesomeIcons.solidSnake, size: 64)),
-          );
         } else {
           return const SizedBox(
             width: 300.0,

flutter/lib/pages/message_list/message_list.dart

@@ -72,6 +72,9 @@ class _MessageListPageState extends State<MessageListPage> with RouteAware {
 
       _channels = SCNDataCache().getChannelMap();
 
+      //TODO this is not 100% correct - the message-cache contains (which is right!) all messages, even from unsubscribed channels
+      //TODO what we should do is save another list in SCNDataCache, with the result of the last getMessageList call (page-1) and use that
+      //TODO this way we only get 1 page of data from cache, but its a weird behaviour anway that we loose data once _backgroundRefresh is finished
       _pagingController.value = PagingState(nextPageKey: null, itemList: SCNDataCache().getMessagesSorted(), error: null);
 
       _backgroundRefresh(true);

flutter/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -9,6 +9,7 @@ import device_info_plus
 import firebase_core
 import firebase_messaging
 import flutter_local_notifications
+import mobile_scanner
 import package_info_plus
 import path_provider_foundation
 import share_plus
@@ -20,6 +21,7 @@ func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FLTFirebaseCorePlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseCorePlugin"))
   FLTFirebaseMessagingPlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseMessagingPlugin"))
   FlutterLocalNotificationsPlugin.register(with: registry.registrar(forPlugin: "FlutterLocalNotificationsPlugin"))
+  MobileScannerPlugin.register(with: registry.registrar(forPlugin: "MobileScannerPlugin"))
   FPPPackageInfoPlusPlugin.register(with: registry.registrar(forPlugin: "FPPPackageInfoPlusPlugin"))
   PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
   SharePlusMacosPlugin.register(with: registry.registrar(forPlugin: "SharePlusMacosPlugin"))

flutter/pubspec.lock

@@ -612,6 +612,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.6"
+  mobile_scanner:
+    dependency: "direct main"
+    description:
+      name: mobile_scanner
+      sha256: e93461298494a3e5475dd2b41068012823b8fe2caf8d47ba545faca2aa3767d6
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.0.1"
   nested:
     dependency: transitive
     description:

flutter/pubspec.yaml

@@ -37,6 +37,7 @@ dependencies:
 
 
   path: any
+  mobile_scanner: ^6.0.1
 dependency_overrides:
   font_awesome_flutter:
     path: deps/font_awesome_flutter